Analysis of high frequency QRS potentials observed during acute myocardial infarction

Analysis of unpredictable intra-QRS potentials based on multi-step linear prediction modeling for evaluating the risk of ventricular arrhythmias

“…The study results showed that the VT patients have a significant reduction of UIQP in leads Y and Z. Several previous studies have reported that MI [9,10] reduced high-frequency components within the QRS complex. The loss of myocardial generator units would be expected to attenuate both low and high QRS frequencies [11].…”

Serial changes in the high‐frequency ECG during the first year following acute myocardial infarction

“…In the present study the first highresolution ECG was recorded a few days after the acute MI. Berkalp et al (1993) found that RAZs were more often present in the MI patients on the first day compared with healthy subjects and MI patients on the 10th day. In the present study the change in HF-QRS over time was similar in all groups, regardless of location of the MI.…”

High‐frequency QRS electrocardiogram

“…In patients with old inferior MI, HF-QRS amplitudes were decreased in leads II, aVF and III (Goldberger et al, 1980(Goldberger et al, , 1981. In the frequency range of 150-250 Hz when using the Frank leads (X-, Y-, and Z-leads), decreased amplitudes have also been found in patients with old anterior and/or inferior MI (Berkalp et al, 1993) and in patients with angiographically documented ischaemic heart disease (Seegobin et al, 1995). However, a study that used three bipolar leads and the >90 Hz frequency range showed increased (rather than decreased) HF-QRS amplitudes in patients with old MI (Novak et al, 1994), while another showed that 12-lead RMS voltages in the 150-250 Hz frequency range failed to separate individuals with versus without an old MI on the conventional ECG (Ringborn et al, 2001).…”

“…, 1980, 1981). In the frequency range of 150–250 Hz when using the Frank leads (X‐, Y‐, and Z‐leads), decreased amplitudes have also been found in patients with old anterior and/or inferior MI (Berkalp et al. , 1993) and in patients with angiographically documented ischaemic heart disease (Seegobin et al.…”